Ratchet pipe-threader.



M. DIXON. BATGHET PIPE THREADER. APPLIOATION FILED 0012, 1907. 921,518,Patented May 11, 1909.

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MATTHEW DIXON, OF PITTSBURG, PENNSYLVANIA.

RATCIEET PIPE-THREADER.

T all whom it may concern:

Be it known that I, MATTHEW DIXON, a citizen of the United States ofAmerica, residing at Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inRatchet Pipe-Threaders, of which the following is a specification,reference being had therein to the accompanying drawing.

This invention relates to. ratchet pipe threaders, and its object is, toprovide a simple but effective device for threading pipes either whenheld in a bench vise, or when in position within a trench or ditch.

The invention comprises a casing containing a ratchet, thread-cuttersand means for adjusting the same, a spring controlled pawl for rotatingsaid ratchet and a handle bar co operating with said pawl.

The invention also consists of novel means for clamping the pipe withinthe casing and other features of construction all of which will be fullydescribed hereinafter in connection with the accompanying drawing whichforms a part of this specification, and set forth in the appended claim.

In the drawing, Figure 1 is a top plan view of a ratchet pipe threaderembodying the invention, Fig. 2 is a side elevation of the same, andFig. 3 is a longitudinal sectional view, Fig. 4 is a cross sectionalview on the line :cr of Fig. 1, Fig. 5 is a horizontal sectional viewtaken on the line yy of Fig. 3.

To construct my improved pipe threader, I provide a circular body 1having at diametrically opposite sides, threaded sockets 2 and 3respectively to receive operating handles for turning the threader aswill be more fully explained hereinafter. The circular body 1 ispreferably provided with segmental-shaped hollowed out portions orchambers 1, made simply for the purpose of lightening the circular bodyand are not essential to the operation of the device.

The circular body 1 is provided with a central annular recess 5, at thelower end of which is an inwardly-extending annular flange 6 carried bythe circular body, and seated in said annular recess of the circularbody is a ratchet wheel 7 provided with a depending sleeve 8, projectingsome distance below the bottom of the circular body.

Specification of Letters Patent.

Application filed October 2, 1907.

PatentedMay 11, 1909.

Serial No. 395,586.

Anti-friction balls 9 are provided as a bearing for the ratchet wheel 7,these balls being arranged in confronting ball racesformed in the sleeve8 at the upper end of the latter and in the face of the flange 6.

The ratchet wheel 7 is retained in the circular body by means of acollar 10 secured to the sleeve 8 by set-screws 11, and abutting againstthe underneath face of the circular body.

The central bore of the ratchet wheel communicates with the bore of thesleeve 8, and in said sleeve and the bore of the ratchet wheel isarranged a bushing 12 held in said sleeve and wheel by means of aset-screw 14 carried by the sleeve 8, the inner end of the set-screwengaging in an annular groove 15 provided therefor in the bushing, thelower end of the bushing being flanged to abut against the lower end ofthe sleeve 8. This bushing can be readily removed, and another bushinginserted to conform to the size of the pipe to be threaded.

The ratchet wheel carries a circular head 16 provided on its upper facewith transversely-extending ribsor guides 17, between which is arrangedthe cutters 18 secured to the head 16 of the ratchet wheel by setscrews19, and held. against end thrust during the cutting operation by setscrews 20 which are mounted in ears or lugs 21 carried by said circularhead 16. These cutters are provided on their inner ends with clearancenotches 22, through which the shavings or chips formed during thethreading operation pass to the discharge passages 23 provided in thehead 16.

In either of the sockets 2 or 3 is mounted a hollow handle member 24threaded at its inner end into said socket and provided at its outer endwith a knurled surface 25 for convenience in operating. In the inner endof this hollow handle member is a hollow threaded plug or bushing 26,and extending through the hollow handle member and said hollow plug orbushing is a pawl in the form of a rod 27, the inner end of the rodbeing provided with a head 28 having a tooth 29 for engagement with theteeth of the ratchet wheel 7 and the outer end of said rod is providedwith a knurled button or head 30 by means of which the rod can be pulledrearwardly in the hollow handle member and the head 28 reversed whendesired. In the socket 2 or 3 according to which one has the hollowhandle therein is arranged a spring 31, one end of which abuts againstthe head 28 ,and the other end of which abuts against the inner end ofthe hollow handle member 251.

By grasping the button 30 and pulling outwardly on the rod 27, the tooth29 is retracted from engagement with the ratchet wheel and the rod canthen be turned up-sidedown, or in other words given a half revolution soas to present the tooth 29 of the ratchet wheel in position to operatethe wheel in the reverse direction.

Where desired, an additional hollow handle member 24 can be inserted inthe opposite socket member so as to provide two handles for operatingthe pipe threader when occasion requires.

Having fully described my invention what I claim as new and desire tosecure by Letters Patent is,

In a pipe threader, a circular body provided with a centrally arrangedchamber, a ratchet wheel mounted in said chamber, a head formed integralwith the ratchet Wheel and seated upon the top of said body, said headprovided with parallel guides, cutters adjustably mounted between theguides carried by the head, said head provided with lateral dischargepassages leading from the space between the guides to the periphery ofthe head, and means carried by said body and engaging with said wheelfor rotating it.

In testimony whereof I afiix my signature in the presence of twowitnesses.

MATTHEW DIXON.

Witnesses:

THOMAS DIXON, MAX I-I. SRoLovrrz.

